Download the Outlook 2010 QuickFiler add-in
Extract QuickFilerOlk2010Setup.zip to a temporary folder. In this folder double click Setup.exe
In order to keep the setup small the prerequisites for Office 2010 add-ins are not included. You need to have installed at least Office 2010 with Service Pack 1. If you start the setup it will try to download the .NET Framework 4 if it is not already installed.
Download also the Visual Studio source files of the Outlook 2010 QuickFiler add-in here.